Improvement in mill-spindles



J. W. PORTER.

Mill-Spindle.

Patnted July 30, 1878.

INVENTOR ATTORNEYS mamas, P

UNITED JOHN W. PORTER, OF WESTPORT, CONNECTICUT.

IMPROVEMENT IN MILL-SPINDLES.

Specification forming part of Letters Patent No. 206,483, dated July 30, 1878; application filed July 9, 1878.

To all whom it may concern Be it known that I, JOHN VLPORTER, of VVestport, in the county of Fairfield and State of Connecticut, have invented a new and useful Improvement in AntiVibration Millstone- Spindles, of which the following is a specification:

Figure 1 is a side view of my improved spindle. Fig. 2 is a longitudinal section of the same, taken through the line 00 at, Fig. 1. Fig. 3 is a cross-section of the same, taken through the line y 3 Fig. 2. Fig. 4 is a cross-section of the same, taken through the line 22, Fig. 2.

Similar letters of reference indicate correspondin g parts.

The object of this invention is to furnish IDlllSPlHdlE-S which shall be so constructed as to prevent their vibration, so that the stones will run truer and will grind the grain evener, making more and better flour than is otherwise practicable.

The invention consists in the combination of the sleeve, the clutches, and the collar with the spindle, as hereinafter fully described.

A represents an ordinary niillstone-spindle, the lower end of which revolves in a step in the usual way. The upper part of the spindle A revolves in a bushing inthe lower millstone, and its upper end carries the driver and the balance-rynd of the upper n'iillstone. To the spindle A, just below the lower millstone, is keyed or otherwise secured a clutch, B, which dle A. The sleeve C and the clutches B D are kept from slipping apart by a collar, E, placed upon the lower end of the spindle A against the clutch D, and secured in place by one or more set-screws, F.

Power is applied to the spindle A by means of a pulley or gear-wheel attached to the sleeve C, and which is not shown in the drawings.

By this construct-ion the vibration of the spindle A will be wholly prevented, so that the niillstones will run with perfect accuracy when once properly adjusted, and will grind the grain uniformly over their entire faces.

Having thus described lnyinvention, I claim as new and desire to secure by Letters Patent The combination of the sleer e C, the clutches B I), and the collar E with the spindle A, substantially as herein shown and described.

JOHN W. PORTER.

Witnesses:

WALTER A. HOWARTH, JOHN R. PALMER. 

